00:01
Converting light years into kilometers gets a little complicated because the light here is looking at the speed of light.
00:13
So we are given 4 .3 light years and we want to know how many kilometers are in 4 .3 light years.
00:31
So we know that light travels at a speed of 300 ,000 kilometers per second.
00:54
So light travels 300 ,000 kilometers per second.
00:59
But what is that in a year? so we need to convert the time port.
01:08
Portion of this.
01:11
Okay, so we're going to start off with 300 ,000 kilometers per second, per one second.
01:26
And we want to change our seconds into years.
01:34
So when we look at this, this is the part that we're changing.
01:38
Usually we change the top part, but now we're going to change.
01:43
The bottom part of our fraction.
01:47
So converting seconds into years, if you know how many seconds are in a year, it's just one step.
01:55
I, however, do not know how many seconds are in a year.
01:59
But i do know that there are 60 seconds in one minute.
02:05
So if seconds is in my denominator, that means seconds is going to be in the numerator.
02:12
And i know there are 60 seconds in one minute.
02:19
So i can cross off seconds.
02:22
Looks like an 8.
02:27
Then i can change minutes into hours.
02:31
And i know that there are 60 minutes in one hour.
02:37
So if minutes is in the bottom, now minutes needs to be in the top.
02:43
And then changing hours.
02:45
How many hours are in one day? i know that there are 24 hours in one day.
02:56
And i make sure that hours at the bottom crosses with hours at the top.
03:02
And then how many days in one year? i know there are 365 days in one year.
03:14
So days crosses off...